CN220440117U - Multi-beam laser generator - Google Patents

Abstract

The utility model provides a multi-beam laser generator, which comprises a laser source, a collimating lens and a polyhedral prism; the polyhedral prism comprises a prismatic surface formed by a plurality of strip-shaped planes in an abutting mode, an included angle is formed between two adjacent strip-shaped planes, and the included angle between each group of adjacent strip-shaped planes is equal. According to the utility model, a plurality of laser beams can be generated by using only one laser light source through the polyhedral prism, so that the homology of the light beams is ensured; compared with a beam splitting prism, an optical fiber and the like, the utility model is easier for structural design, production and assembly, has low structural cost and low labor cost; as the utility model adopts prism conversion, the quality of the light beam is better than that of the diffraction grating.

Description

Multi-beam laser generator

Technical Field

The utility model relates to the field of lasers, in particular to a multi-beam laser generator.

Background

The laser light source has wide application in the aspects of indication marks, atmosphere lamps, industrial cutting and the like, and is characterized in that the laser light source is collimated, or the point is converted into a linear laser light source, or is converted into various pattern light sources for use, and the application range is wide.

At present, a plurality of light beams are generated by a diffraction grating, an optical fiber, a beam splitting prism, a plurality of light emitting sources, a vibrating mirror or other complex optical structures in the market, so that the beam splitting effect is poor, the overall structure of the light emitting sources is complex, and the problems of high cost, high debugging difficulty and the like are generated.

Disclosure of Invention

An object of the present application is to provide a multi-beam laser generator, which aims to solve the above-mentioned problems in the prior art.

The embodiment of the application provides a multi-beam laser generator which sequentially comprises a laser source, a collimating lens and a polyhedral prism; the polyhedral prism comprises a prismatic surface formed by a plurality of strip-shaped planes in an abutting mode, an included angle is formed between two adjacent strip-shaped planes, and the included angle between each group of adjacent strip-shaped planes is equal; the prismatic surface is positioned in the incident direction of the light or the emergent direction of the light.

Further, the included angle between two adjacent strip-shaped planes is 5 degrees.

Further, each of the strip-shaped planes spans the surface of the polyhedral prism, and a plurality of the strip-shaped planes are parallel to each other and are arranged side by side.

Further, the width of each strip-shaped plane is equal.

Further, the whole polyhedral prism is cylindrical, and the surface of the polyhedral prism opposite to the prismatic surface is a straight surface.

Further, a collimating lens is arranged in the light emitting direction of the laser light source, and a polyhedral prism is arranged in the light emitting direction of the collimating lens.

Further, the collimating lens is a convex lens, and the convex surface faces towards the polygon prism.

The beneficial effects of the utility model are as follows: according to the utility model, a plurality of laser beams can be generated by using only one laser light source through the polyhedral prism, so that the homology of the light beams is ensured; compared with a beam splitting prism, an optical fiber and the like, the utility model is easier for structural design, production and assembly, has low structural cost and low labor cost; as the utility model adopts prism conversion, the quality of the light beam is better than that of the diffraction grating.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a schematic diagram of the overall structure of a polygon prism.

Fig. 3 is a sectional view of a polyhedral prism.

Fig. 4 is a schematic side view of a polygonal prism.

Fig. 5 is an optical schematic a of the present utility model.

Fig. 6 is an optical schematic B of the present utility model.

In the figure: 1. a laser light source; 2. a collimating lens; 3. a polyhedral prism; 31. a strip-shaped plane.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

A multi-beam laser generator as shown in fig. 1 includes a laser light source 1, a collimator lens 2, and a polygon prism 3. The laser light source 1 is provided with a collimating lens 2 in the light emitting direction, and the collimating lens 2 is provided with a polygon prism 3 in the light emitting direction.

The laser light source 1 is an electro-optical device capable of emitting a laser beam, and is mainly used for emitting the laser beam. In this embodiment, a TO package laser diode commonly used in the market is taken as an example, and the laser light source is illustrated in this embodiment. The same may be C-packaged or F-packaged laser diode, or solid laser pumped by laser diode, gas laser such as helium-neon laser, or laser blue-to-white fluorescence-laser mixed light source, etc. Parameters such as the external dimension, the packaging form, the wavelength, the power, the combined device and the like of the laser light source 1 can be selected and adjusted according to actual conditions.

The collimator lens 2 is an optical element, and mainly serves to compress the divergence angle of the laser beam emitted from the laser light source 1 to be collimated into quasi-parallel light, or to be focused to a certain position, so that the beam emitted from the laser light source 1 travels farther, or reaches a specific position. For the same laser source 1, the size of the divergence angle after the beam is collimated or the size of the focused light spot is related to the focal length of the collimating lens 2 and the distance between the collimating lens 2 and the luminous point of the laser source 1, so that the laser transmission principle and the optical principle are satisfied.

In this embodiment, the collimating lens 2 is a single plano-convex lens, or may be a biconvex or lunar convex lens, or a concave lens plus a convex lens, or a combination of a plurality of lenses, as long as the effect of changing the divergence angle of the light beam by the convex lens is satisfied. The convex surface faces towards the polygon mirror 3 when used in the generator.

As shown in fig. 2 to 4, the polyhedral prism 3 has a cylindrical shape as a whole, one surface is a prismatic surface formed by abutting a plurality of bar-shaped flat surfaces 31, and the other surface is a flat surface. The function is to convert the shaped beam into multiple beams; the number of converted light beams is related to the number of strip surfaces on the polygon prism 3 and the size of the area of the incident light beam on the strip surfaces, and the number of strip surfaces occupied by the incident light beam and the number of output light beams.

The number of the strip-shaped planes 31 on the prismatic surface is plural, and the width d of each strip-shaped plane 31 is equal. An included angle is formed between two adjacent strip-shaped planes 31, and the included angle alpha between each group of adjacent strip-shaped planes 31 is equal.

Each of the strip-shaped planes 31 spans the surface of the polygon mirror 3, and the plurality of strip-shaped planes 31 are arranged parallel to each other and side by side. So that the output beams are in the same plane; the included angle between the output beams is related to the included angle between the strip surfaces and the refractive index of the material, and satisfies the beam refraction formula, and the optical principle is shown in fig. 5 and 6.

In this embodiment, the flat surface of the polygon mirror 3 faces the incident beam, and when the prism is thin, the prism curved surface can face the incident beam, so that the orientation of the polygon mirror 3 cannot be used as a feature for avoiding the present patent.

The polygonal prism 3 provided in this embodiment has a cylindrical periphery, the number of the strip-shaped planes 31 is 10, and the acute angle included angle between the adjacent strip-shaped planes 31 is 5 °, which is merely an example, and the shape of the polygonal prism 3, the number and size of the multiple faces, the included angle between the multiple faces, the size of the multiple faces, and the like cannot be taken as the characteristics of avoiding this patent.

The embodiment gives the case that the strip surfaces of the polygon prism 3 are parallel, so that output beams which can be on the same surface are obtained, the strip surfaces of the polygon prism 3 are not parallel and are mutually staggered, and multi-beam output which is mutually staggered can be obtained.

The divergence angle of the multibeam output after the polygon mirror 3 is similar to that of the incident beam, and there is a slight variation due to the influence of the thickness of the polygon mirror 3, the refractive index of the material, and the like.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. A multi-beam laser generator is characterized by comprising a laser source, a collimating lens and a polyhedral prism in sequence; the polyhedral prism comprises a prismatic surface formed by a plurality of strip-shaped planes in an abutting mode, an included angle is formed between two adjacent strip-shaped planes, and the included angle between each group of adjacent strip-shaped planes is equal; the prismatic surface is positioned in the incident direction of the light or the emergent direction of the light.

2. A multi-beam laser generator as claimed in claim 1, wherein the angle between two adjacent strip planes is 5 °.

3. A multi-beam laser generator as claimed in claim 1 wherein each of said strip planes spans the surface of the polygon prism and a plurality of said strip planes are arranged parallel to each other and side by side.

4. A multi-beam laser generator as claimed in claim 1 wherein the width of each of said strip planes is equal.

5. The multi-beam laser generator of claim 1 wherein the polygonal prism is generally cylindrical and the surface of the polygonal prism opposite the curved surface is a flat surface.

6. The multi-beam laser generator according to claim 1, wherein a collimator lens is disposed in a light emitting direction of the laser light source, and a polygon prism is disposed in the light emitting direction of the collimator lens.

7. A multi-beam laser generator as claimed in claim 6 wherein the collimating lens is a convex lens and the convex surface faces the polygonal prism.